Improvement in apparatus for pulverizing porcelain-paste



I have found that with a nlruusrarns PA NIFFIGE.

JOllAN ROBERT ALSING, OF NEWCASTLE-UlON-TYNE, ENGLAND.

IMPROVEMENT IN APPARATUS FOR PULVERIZING PORCELAIN-PASTE. A

Specification forming part of Letters Patent No. 99,128, dated January 25, 1870 patented in Sweden, April 20, 1867.

I, JOHAN ROBERT ALsING, of Stockholm, in the Kingdom of Sweden, now residing at Newcastle-upon-Tyne, in England, do hereby declare the nature of my invention for Improvements in the Means and Apparatus for Pulverizin g Substances, more particularly applicable to the Pulverization of Materials for Porcelain-Paste, to be as follows:

Hitherto a great deal of trouble has been experienced in the pulverization of material for porcelain-paste, as it is necessary to have such material very fine and of a uniform quality.

The object of my invention is to obtain this result, and, from a long experience in the art, porcelain cylinder, or a cylinder lined with porcelain, in which is placed a number of glass or porcelain balls, the best result can be obtained.

In neither of the references given in the official letter of December 22, 1869, are these devices shown. The cylinders there shown are made of iron, which, unless highly polished inside, would not answer the purpose at all, as the paste would adhere to the sides, clog, and could not be used in the lumpy state in which it would be in the cylinder.

Another great advantage of my machine is the very simple construction and arrangement of its parts.

By the sieve c and sliding shutter d the eX- act fineness can be ascertained, as the shutter can be opened, and, the paste being allowed to fall through, the exact quality required can be ascertained. If the material is not pulverized fine enough, the shutter is again closed, and the machine again revolved till the material is of the desired fineness.

This explanation will, I hope, show the advantage of my machine over the references given in the oifieial letter of December 22, 1869; and I do hereby submit a claim, confining myself to the construction and arrangement of the same.

This invention has for its object to simplify the process of pulverization, such as has heretofore been employed for the reduction of ma terials for porcelain-paste and other similar substances.

It consists in placing such substances, in small fragments, in a cylinder or druin, by

preference of strong porcelain, to such an extent as to fill about one'fourth of its capacity,

and in then introducing porcelain or glass balls to the extent of another fourth part of the capacity of the cylinder. This latter is then made to revolve, at a speed of about thirty to thirty-five revolutions a minute, during from four to five hours. The substances will, by this means, have been reduced to a very fine powder, which may then at once he employed without further preparation.

The drum is provided with one or more openin gs in its circumference, having sliding covers, through which the materials and balls are introduced. hen the former have been reduced to a powder of the requisite fineness, the covers are removed and replaced by gratings, with apertures suflieiently small to prevent the balls from passing through. The drum is then caused to revolve again, whereby the pulverized materials will be made to pass out through the gratings intoi aireceptaele below.

By this improved process a great saving of time and power is effected as compared with the process heretofore employed for pulverizing materials for porcelain-paste.

0n the accompanying sheet of drawings is shown the before-described improved apparatus. 77 m Figure 1 is a side viewof my invention. Fig. 2, a longitudinal central section ofthe same. Fig. 8, a transverse vertical section ofthe same, taken in the line w m, Fig. 2.

Similar letters of reference indicate corresponding parts in the several figures.

a is the porcelain cylinder, which may, if desirable, be inclosed in a wooden jacket, a. This cylinder revolves on central gudgeons b I), supported in bearin gs by a suitable frame-work. c is an opening in the cylinder and jacket, near or at one end of the same, which is closed by means of a slide, (1, or a screen, 0. Through this opening, the material to be pulverized and the porcelain or glass balls (1 d are introdueed.

After the pnlverization of the materials has been effected, the slide (1 is removed, and the screen 6 adjusted in its place, so as to cover the opening 0. (See Fig. 2.) This allows the pulverized materials to pass through it, but retains the balls.

The rotation of the cylinder is continued during about ten or fifteen minutes, during which time the powder falls into a receptacle placed below. 7

Having thus described the nature of this invention, and in what manner the same is to be performed, I wish it to be understood that I am aware that the materials for gunpowder, and also other substances, have been incorporated and crushed by placing them inside a rotating metal or wooden cylinder, together with metal or wooden balls.

I do not claim, broadly, the employment of revolving cylinders and balls for the pulverization of material for porcelain-paste; but

Vhat I do claim as my invention, and desire to secure by Letters Patent, is

J. R. ALSING.

Witnesses:

LUDWIG 1\[ATTIIIESSEN,

34 Blackett Street, Newcastle-0n-Tyne. HENRY BROCKBANK.

20 Clarence Crescent, Newcastle-om11 120. 

